fix grammar

README.md

@@ -2,7 +2,7 @@ Git Ahead Check
 ===============
 
 Инструмент для людей, которые много работают  
-(Tools for check unpusher Git repos)
+(A tool for checking changes that have not been sent in Git repos)
 
 ![img](./.docs/screenshot.png)
 

shard.yml

@@ -5,7 +5,7 @@ authors:
   - Alexander Popov <iiiypuk@fastmail.fm>
 
 description: |
-  Tools for check unpusher Git repos
+  A tool for checking changes that have not been sent in Git repos
 
 license: MIT-0